Merge "Add DAL parsing static lib for StatementService." into main

// Copyright (C) 2024 The Android Open Source Project

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

package {

    default_applicable_licenses: ["frameworks_base_license"],

}

android_library {

    name: "StatementServiceParser",

    use_resource_processor: true,

    srcs: [

        "src/**/*.java",

        "src/**/*.kt",

    ],

    target_sdk_version: "29",

}

<?xml version="1.0" encoding="utf-8"?>

<!-- Copyright (C) 2024 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");

     you may not use this file except in compliance with the License.

     You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software

     distributed under the License is distributed on an "AS IS" BASIS,

     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

     See the License for the specific language governing permissions and

     limitations under the License.

-->

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.android.statementservice.parser">

</manifest>

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/*

 * Copyright (C) 2024 The Android Open Source Project

 *

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

@file:JvmName("DalComponentParser")

package com.android.statementservice.parser

import android.os.PatternMatcher.PATTERN_ADVANCED_GLOB

import android.os.PatternMatcher.PATTERN_LITERAL

import android.os.PatternMatcher.PATTERN_PREFIX

import android.os.PatternMatcher.PATTERN_SIMPLE_GLOB

/**

 * Parses a DAL component matching expression to Android's {@link android.os.PatternMatcher} type

 * and pattern. Matching expressions support the following wildcards:

 *

 *  1) An asterisk (*) matches zero to as many characters as possible

 *  2) A question mark (?) matches any single character.

 *

 * Matching one to many characters can be done with a question mark followed by an asterisk (?+).

 *

 * @param expression A matching expression string from a DAL relation extension component used for

 *                   matching a URI part. This must be a non-empty string and all characters in the

 *                   string should be decoded.

 *

 * @return Returns a Pair containing a {@link android.os.PatternMatcher} type and pattern.

 */

fun parseMatchingExpression(expression: String): Pair<Int, String> {

    if (expression.isNullOrEmpty()) {

        throw IllegalArgumentException("Matching expressions cannot be an empty string")

    }

    var count = 0

    var isAdvanced = expression.contains("?*")

    val pattern = buildString {

        for (char in expression) {

            when (char) {

                '*' -> {

                    if (this.endsWith('.') && !this.endsWith("\\.")) {

                        append('+')

                    } else {

                        count += 1

                        append(".*")

                    }

                }

                '?' -> {

                    count += 1

                    append('.')

                }

                '.' -> {

                    append("\\.")

                }

                '[', ']', '{', '}' -> {

                    if (isAdvanced) {

                        append('\\')

                    }

                    append(char)

                }

                else -> append(char)

            }

        }

    }

    if (count == 0) {

        return Pair(PATTERN_LITERAL, pattern)

    }

    if (count == 1 && pattern.endsWith(".*")) {

        return Pair(PATTERN_PREFIX, pattern.dropLast(2))

    }

    if (isAdvanced) {

        return Pair(PATTERN_ADVANCED_GLOB, pattern)

    }

    return Pair(PATTERN_SIMPLE_GLOB, pattern)

}

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{

  "postsubmit" : [

    {

      "name": "StatementServiceTests"

    }

  ]

}

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// Copyright (C) 2024 The Android Open Source Project

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

package {

    default_applicable_licenses: ["frameworks_base_license"],

    default_team: "trendy_team_framework_android_packages",

}

android_test {

    name: "StatementServiceTests",

    use_resource_processor: true,

    test_suites: ["general-tests"],

    srcs: ["src/**/*.kt"],

    static_libs: [

        "androidx.test.ext.junit",

        "androidx.test.runner",

        "StatementServiceParser",

        "truth",

    ],

}